Trolling motor basics-help please?

[mcjeff72]

I'm looking on line for a bow mount trolling motor to use on my 19ft bowrider, that is normally used for pulling children on tubes. My question: Is a 24v trolling motor a possibility? I've used several 12v motors on my aluminum fishing boats, but how would I incorporate another battery, and allow the alternater to charge both? or is this not possible?

 

[commuter]

Re: Trolling motor basics-help please?

I run a 24 volt bow mount trolling motor on my 16' aluminum v fishing boat.
I use 2 24 volt DEEP CYCLE batteries. I'm pretty sure you would need to add 2 batteries because the one you have now is a Cranking Battery to start the engine and not a deep cycle. Also when you hook up the 2 batteries to get 24 volts I don't think it is possible to pull 12 volts of one of the batteries.
Please guys correct me if I'm wrong.

Commuter

 

[mcjeff72]

Re: Trolling motor basics-help please?

Actually, the battery I'm using now for starting the engine, is a deep cycle battery that I stole from my little fishing boat trolling motor, it starts it great, and always has plenty of juice left.

So you're saying that if I did hook up to another battery, that the alternater would only charge 1 of them anyway?

The main reason I'm asking, is because there's a nice trolling motor(great price) on ebay, but is 24v.

Thanks for your help

 

[rndn]

Re: Trolling motor basics-help please?

Most if not all people who use a 24v or 36v trolling motor have an onboard charger that plugs into the house current to keep them charged. Most boaters would never drive the main engine long enough to keep 1 or 2 deep cycle batteries fully charged and ready for use. I use one battery for my trolling motor and throw it on the charger after every fishing trip.

 

[wire2]

Re: Trolling motor basics-help please?

I'm looking on line for a bow mount trolling motor to use on my 19ft bowrider, that is normally used for pulling children on tubes. My question: Is a 24v trolling motor a possibility? I've used several 12v motors on my aluminum fishing boats, but how would I incorporate another battery, and allow the alternater to charge both? or is this not possible?

I'm reading that you intend to pull tubes with this? If so, don't plan on going over 5-6 mph.

Yes, you can add a 2nd battery for 24 volts to a troll motor.
There's several possibilities;
a battery switch will allow you to charge batt A or B, or both from the alternator.

Know that it will take a long time to fully charge 2 deep cycle batteries from a standard 65 A alternator after part discharge.

Or, you can leave your existing wiring as is (on batt A), add a 2nd battery (B) and connect the - of B to + of A, then connect troll cable to + of B and - of A for 24 volts. You will HAVE to put a 12 v charger on B after use.

 

[timcom71]

Re: Trolling motor basics-help please?

If you use the trolling motor a lot and draw down the batteries, you may not be able to start your motor. Not good. Thats why you have to have a separate battery system for your trolling motor. Also you have to recharge those deep cycles after each use. Nothing good can happen if you use the same batteries for starting and trolling.

Tim

 

[Silvertip]

Re: Trolling motor basics-help please?

Wire2 -- a 24V trolling motor requires two 12V batteries wired in Series -- not parallel. A battery switch in that application will not allow charging one, two, or both. The series connection between the two batteries would need to be broken to use the engine alternator to charge both batteries. Besides, as was pointed out earlier, the alternator must have relatively high output (20 amps or more) and be run wide open for hours to charge deeply discharged batteries. In a 24V application, add a dual bank on-board charger and plug into shore power for best performance.

 

[bassboy1]

Re: Trolling motor basics-help please?

Your trolling motor needs its own group 27 or 29 deep cycle batteries. Your engine needs a single starting battery. Period. Also, don't even pretend to think that your alternator would keep a deep cycle charged. Charge your batteries before going fishing, and then stop fishing when they die. Also, you can get an onboard charger for the deep cycles. It is a charger that bolts into your boat, and is hard wired onto your battery. So, if your boat is in a garage or something, near power, you can just plug in an extension cord, without having to move batteries. At my house, the boats are outside, so we lug batteries inside, and put them on portable chargers.

 

[wire2]

Re: Trolling motor basics-help please?

Wire2 -- a 24V trolling motor requires two 12V batteries wired in Series -- not parallel. A battery switch in that application will not allow charging one, two, or both. The series connection between the two batteries would need to be broken to use the engine alternator to charge both batteries. Besides, as was pointed out earlier, the alternator must have relatively high output (20 amps or more) and be run wide open for hours to charge deeply discharged batteries. In a 24V application, add a dual bank on-board charger and plug into shore power for best performance.

Dang! You're right, Silver. I didn't think it through with the battery switch description. Thanks. :redface:

 

[Wee Hooker]

Re: Trolling motor basics-help please?

They have onboard batter switch's /isolators that allow you to hook up 3 batteries ( one starting and two deep cycles). These isolate the starting battery so you can't drain it and allow charging of all the batteries at once. 24V motors are ideal for larger boat like yours. They allow for much less current draw from motors that need big power.